########################################################################
# Mail eXchange (MX) configuration
#
# {{ ansible_managed }}
# Do NOT edit this file directly!

smtpd_banner        = $myhostname ESMTP $mail_name (Debian/GNU)
biff                = no
readme_directory    = no
mail_owner          = postfix
compatibility_level = 2
smtputf8_enable     = no

delay_warning_time     = 4h
maximal_queue_lifetime = 5d

myorigin            = /etc/mailname
myhostname          = mx{{ mxno | default('') }}.$mydomain
mydomain            = fripost.org
append_dot_mydomain = no

mynetworks_style = host

queue_directory       = /var/spool/postfix-{{ postfix_instance[inst].name }}
data_directory        = /var/lib/postfix-{{ postfix_instance[inst].name }}
multi_instance_group  = {{ postfix_instance[inst].group | default('') }}
multi_instance_name   = postfix-{{ postfix_instance[inst].name }}
multi_instance_enable = yes

# No local delivery
mydestination        =
local_transport      = error:5.1.1 Mailbox unavailable
alias_maps           =
alias_database       =
local_recipient_maps =

message_size_limit  = 67108864
recipient_delimiter = +

# Forward everything to our internal outgoing proxy
relayhost     = [{{ postfix_instance.out.addr | ipaddr }}]:{{ postfix_instance.out.port }}
relay_domains =


# Virtual transport
# We use a dedicated "virtual" domain to decongestion potential
# bottlenecks on trivial_rewrite(8) due to slow LDAP lookups in
# tranport_maps.
virtual_transport     = error:5.1.1 Virtual transport unavailable
virtual_alias_domains = !lmdb:$config_directory/virtual/transport
                        ldap:$config_directory/virtual/domains.cf
virtual_alias_maps    = pcre:$config_directory/virtual/reserved_alias.pcre
                        # unless there is a matching user/alias/list...
                        ldap:$config_directory/virtual/mailbox.cf
                        ldap:$config_directory/virtual/alias.cf
                        ldap:$config_directory/virtual/list.cf
                        # ...we resolve alias domains and catch alls
                        ldap:$config_directory/virtual/alias_domains.cf
                        ldap:$config_directory/virtual/catchall.cf
transport_maps        = lmdb:$config_directory/virtual/transport


# Don't rewrite remote headers
local_header_rewrite_clients               =
# Pass the client information along to the content filter
smtp_send_xforward_command                 = yes
# Avoid splitting the envelope and scanning messages multiple times
smtp_destination_recipient_limit           = 1000
reserved-alias_destination_recipient_limit = 1
# Tolerate occasional high latency
smtp_data_done_timeout           = 1200s


smtp_tls_security_level         = none
smtpd_tls_security_level        = may
smtpd_tls_ciphers               = medium
smtpd_tls_protocols             = !SSLv2, !SSLv3
smtpd_tls_cert_file             = $config_directory/ssl/mx.fripost.org.pem
smtpd_tls_key_file              = $config_directory/ssl/mx.fripost.org.key
smtpd_tls_dh1024_param_file     = /etc/ssl/dhparams.pem
smtpd_tls_CApath                = /etc/ssl/certs/
smtpd_tls_session_cache_database=
smtpd_tls_received_header       = yes


# http://en.linuxreviews.org/HOWTO_Stop_spam_using_Postfix
# http://www.howtoforge.com/block_spam_at_mta_level_postfix

strict_rfc821_envelopes = yes
smtpd_delay_reject      = yes
disable_vrfy_command    = yes

# UCE control
invalid_hostname_reject_code        = 554
multi_recipient_bounce_reject_code  = 554
non_fqdn_reject_code                = 554
relay_domains_reject_code           = 554
unknown_local_recipient_reject_code = 554
unknown_relay_recipient_reject_code = 554
unknown_virtual_alias_reject_code   = 554
unknown_virtual_mailbox_reject_code = 554

postscreen_access_list =
    permit_mynetworks
    cidr:$config_directory/access-list.cidr
postscreen_dnsbl_whitelist_threshold = -1
postscreen_cache_map = lmdb:$data_directory/postscreen_cache

postscreen_blacklist_action = drop
postscreen_dnsbl_threshold  = 8
postscreen_dnsbl_action     = enforce
postscreen_dnsbl_sites      =
    zen.spamhaus.org=127.0.0.[10;11]*8
    zen.spamhaus.org=127.0.0.[4..7]*6
    zen.spamhaus.org=127.0.0.3*4
    zen.spamhaus.org=127.0.0.2*3
    #swl.spamhaus.org*-4
    b.barracudacentral.org=127.0.0.2*7
    bl.mailspike.net=127.0.0.2*5
    bl.mailspike.net=127.0.0.[10..12]*4
    wl.mailspike.net=127.0.0.[18..20]*-2
    bl.spameatingmonkey.net=127.0.0.2*4
    bl.spamcop.net=127.0.0.2*2
    dnsbl.sorbs.net=127.0.0.10*8
    dnsbl.sorbs.net=127.0.0.5*6
    dnsbl.sorbs.net=127.0.0.7*3
    dnsbl.sorbs.net=127.0.0.8*2
    dnsbl.sorbs.net=127.0.0.6*2
    dnsbl.sorbs.net=127.0.0.9*2
    list.dnswl.org=127.0.[0..255].0*-2
    list.dnswl.org=127.0.[0..255].1*-3
    list.dnswl.org=127.0.[0..255].[2..3]*-4

postscreen_greet_action         = enforce
postscreen_whitelist_interfaces = static:all


smtpd_client_restrictions =
    permit_mynetworks

smtpd_helo_required     = yes
smtpd_helo_restrictions =
    permit_mynetworks
    reject_non_fqdn_helo_hostname
    reject_invalid_helo_hostname

smtpd_sender_restrictions =
    reject_non_fqdn_sender
    reject_unknown_sender_domain

smtpd_relay_restrictions =
    reject_non_fqdn_recipient
    permit_mynetworks
    reject_unauth_destination
    reject_unlisted_recipient

smtpd_recipient_restrictions =
    check_client_access cidr:$config_directory/access-list.cidr
    check_recipient_access ldap:$config_directory/reject-unknown-client-hostname.cf
    reject_rhsbl_reverse_client dbl.spamhaus.org=127.0.1.[2..99]
    reject_rhsbl_sender         dbl.spamhaus.org=127.0.1.[2..99]
    # defer if "abused legit": DBL return code in the 127.0.1.100+ range
    defer_if_reject
    reject_rhsbl_reverse_client dbl.spamhaus.org=127.0.1.[100..254]
    reject_rhsbl_sender         dbl.spamhaus.org=127.0.1.[100..254]

smtpd_data_restrictions =
    reject_unauth_pipelining

# vim: set filetype=pfmain :